>>> Welles is the title character, one Charles Foster Kane
Who by his action has the traction magnates on the run.
>>> Rosebud was a sled
Rosebud was what William Randolph Hearst called a sensitive portion of Marion Davis’ anatomy. A part Hearst highly appreciated. Hearst failed to see the humor in Welles’ joke.
Even if that story is true (which I doubt), it would have been screenwriter Manciewicz, joke.